6. Break it up. Only have time for half of your usual hour-long workout? Go anyway, or do two 30-minute workouts of cardio or weight training during different times of the day, Lewis says.

7. Train for a marathon, mini-triathlon or backpacking adventure to take the focus off weight loss and put it on gaining strength, speed and/or endurance. You'll lose weight naturally if you balance your calorie intake and stay committed to your training.

8. Ward off exercise boredom by alternating gym workout routines, trying new machines and classes (yoga, Spinning, Pilates, kickboxing) or heading outside for hiking, biking, etc.